Electron Surfing and Drift Accelerations in a Weibel-Dominated High-Mach-Number Shock

被引：77

作者：

Matsumoto, Yosuke ^{[1
,4
]}

Amano, Takanobu ^{[2
]}

Kato, Tsunehiko N. ^{[3
]}

Hoshino, Masahiro ^{[2
]}

机构：

[1] Chiba Univ, Dept Phys, Inage Ku, 1-33 Yayoi Cho, Chiba 2638522, Japan

[2] Univ Tokyo, Dept Earth & Planetary Sci, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[3] Natl Astron Observ Japan, Ctr Computat Astrophys, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[4] Chiba Univ, Inst Global Prominent Res, Inage Ku, 1-33 Yayoi Cho, Chiba 2638522, Japan

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 119卷 / 10期

关键词：

IN-CELL SIMULATION; PARTICLE-ACCELERATION; COLLISIONLESS SHOCKS; PERPENDICULAR SHOCK; BOW SHOCK; SUPERNOVA; INJECTION; REMNANT; WAVES;

D O I：

10.1103/PhysRevLett.119.105101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

How electrons get accelerated to relativistic energies in a high-Mach-number quasiperpendicular shock is presented by means of ab initio particle-in-cell simulations in three dimensions. We found that coherent electrostatic Buneman waves and ion-Weibel magnetic turbulence coexist in a strong-shock structure whereby particles gain energy during shock surfing and subsequent stochastic drift accelerations. Energetic electrons that initially experienced the surfing acceleration undergo pitch-angle diffusion by interacting with magnetic turbulence and continuous acceleration during confinement in the shock transition region. The ion-Weibel turbulence is the key to the efficient nonthermal electron acceleration.

引用

页数：5

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